Balls G-50. This is my Marshall 2204 style amp. I make this in either the stock 2204 circuit or with my personal mods that I like and this is the latter. The stock 2204, to my ears, is a bit bright especially if you arent playing humbuckers. My circuit mods tame that down a bit. I also find the "Low" jack on a standard 2204 to be lame as hell, so this reconfigures things to be more like a standard low jack seen on Fender, Hiwatt, other Marshall, etc. This particular instance adds in an effects loop as well as a post-PI Master Volume. Mix and match Masters!
